Six months af­ter lift­ing hold, FDA wants to re­voke Pro­tag­o­nist's break­through ther­a­py des­ig­na­tion, biotech says

Though last Sep­tem­ber’s clin­i­cal hold on Pro­tag­o­nist Ther­a­peu­tics was lift­ed af­ter on­ly a few weeks, the biotech qui­et­ly dis­closed Wednes­day that an­oth­er FDA con­cern emerged …

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